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function GenerateForm($sText) {

#region Import the Assemblies
[reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null  
[reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null  
#endregion

#region Generated Form Objects
$form1 = New-Object System.Windows.Forms.Form
$textBox1 = New-Object System.Windows.Forms.TextBox
$InitialFormWindowState = New-Object System.Windows.Forms.FormWindowState
#endregion Generated Form Objects

$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 276
$System_Drawing_Size.Width = 362
$form1.ClientSize = $System_Drawing_Size
$form1.DataBindings.DefaultDataSourceUpdateMode = 0
$form1.MaximizeBox = $False
$form1.MinimizeBox = $False
$form1.Name = "form1"  
$form1.Text = "DEIN TITEL"  

$textBox1.Anchor = 15
$textBox1.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 12
$System_Drawing_Point.Y = 12
$textBox1.Location = $System_Drawing_Point
$textBox1.Multiline = $True
$textBox1.Name = "textBox1"  
$textBox1.ReadOnly = $True
$textBox1.ScrollBars = 2
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 252
$System_Drawing_Size.Width = 338
$textBox1.Size = $System_Drawing_Size
$textBox1.TabIndex = 0
$textBox1.text = $sText

$form1.Controls.Add($textBox1)

#Save the initial state of the form
$InitialFormWindowState = $form1.WindowState
#Init the OnLoad event to correct the initial state of the form
$form1.add_Load($OnLoadForm_StateCorrection)
#Show the Form
$form1.ShowDialog()| Out-Null

} #End Function

$strText = "Dein Text der in der Textbox erscheinen soll"  
GenerateForm $strText